Alfvénic Heating in the Cusp Ionosphere-Thermosphere

Graph showing volumetric Joule heating rates
Wednesday, December 19, 2018

The effect of electromagnetic variability on ionosphere-thermosphere heating in the low-altitude geomagnetic cusp is examined.

Michael Wiltberger

Dr. Wiltberger works as research scientist within the High Altitude Observatory whose main area of research is the modeling of the magnetosphere and its interaction with the solar wind and coupled thermosphere-ionosphere system.

Gang Lu

Dr. Gang Lu is a Senior Scientist in the High Altitude Observatory at the National Center for Atmospheric Research. Her primary research interests are in high-latitude ionospheric electrodynamics, solar wind-magnetosphere-ionosphere thermosphere coupling, and space weather.

Hanli Liu

Dr. Hanli Liu is a Senior Scientist in the High Altitude Observatory at the National Center for Atmospheric Research.

Impact of Energetic Particles on the upper Atmosphere

Energetic particles, namely electrons and protons, released from the magnetosphere cover a wide range of energies from a few electron volts (eV) to hundreds of milli-electron volts (MeV).

Modeling high-speed flows in the Earth’s Magnetotail

The magnetosphere is created by the interaction between the solar wind and the Earth’s magnetic field. On the dayside of the Earth pressure from the solar wind compresses the Earth’s dipole magnetic field and on the night side this interaction stretches it out forming a region of space commonly referred to as the magnetotail.

Driving magnetosphere-ionosphere coupling in upper-atmosphere models with observed field-aligned currents from the AMPERE mission

Observed field-aligned currents image
Friday, November 2, 2012

Geomagnetic field-aligned currents from the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) satellite mission are used to drive the Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIEGCM).

Dependence of solar-wind/magnetosphere/ionosphere coupling on the geomagnetic dipole strength

The stand-off distance Rs image
Friday, November 2, 2012

The possible effects of geomagnetic-field changes over periods of millennia on solar wind/magnetosphere/ionosphere/thermosphere coupling was examined, by altering the strength of the geomagnetic dipole in the Coupled Magnetosphere-Ionosphere-Thermosphere (CMIT) model.

Assimilative Mapping of Ionospheric Electrodynamics (AMIE)

The AMIE procedure is an optimally constrained, weighted least-squares fit of electric potential distribution to diverse types of atmospheric observations. Knowledge of these distributions is important in many areas of magnetospheric, ionospheric, and thermospheric physics.


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